feat(stock): batch movement ledger, production batches and shop write-back API

One remaining quantity per batch, kept in ApiCore and always derived:
initial quantity (jarCount / produced quantity) plus the signed movements
in the new BatchMovement ledger, which is never deleted.

- Production batches for MANUFACTURED articles (candles, propolis
  products, ...); articles get a kind and a shop category.
- Withdrawals (farm shop, own use, breakage, sample) and inventory
  corrections on bottlings and production batches, never more than the
  remaining stock; every write locks the bottling or the article row.
- Shop bookings via POST /shop-sync/movements (new scope
  shop-sync:write): idempotent per externalId, articles allocated oldest
  best-before first, returns mirrored onto the batches of the sale,
  invalid entries rejected one by one.
- GET /shop-sync/stock and remainingCount in the shop feed; webhook
  stock.changed after every change (ids only, receivers fetch numbers).
- Bottlings and production batches with movements cannot be deleted.

Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>

ApiCore-Backend/src/bottling/bottling.module.ts

@@ -1,10 +1,11 @@
 import { Module } from '@nestjs/common';
 import { AutomationModule } from '../automation/automation.module';
+import { StockModule } from '../stock/stock.module';
 import { BottlingController } from './bottling.controller';
 import { BottlingService } from './bottling.service';
 
 @Module({
-  imports: [AutomationModule],
+  imports: [AutomationModule, StockModule],
   controllers: [BottlingController],
   providers: [BottlingService],
 })